Airwell FBF030 - Sound Level Characteristics

6-1
SOUND LEVEL CHARACTERISTICS
SM FBFRPM 1-A.0 GB
6. SOUND LEVEL CHARACTERISTICS
6.1 Sound Pressure Level
6.2 Sound Pressure Level Spectrum (Measured as
Figure 1)
FBF030, FBF036 FBF045, FBF060
BAND CENTER FREQUENCIES
,
Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES
,
Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
FAN SPEED LINE
HI
ME
LO
1
m
Mic.
Uni
t
Wall
Ground
Figure 1